HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Generation of a magnetic field by dynamo action in a turbulent flow of liquid sodium

Abstract : We report the observation of dynamo action in the von Karman sodium experiment, i.e., the generation of a magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean and fluctuating parts of the field are studied. The dynamo threshold corresponds to a magnetic Reynolds number R-m similar to 30. A mean magnetic field of the order of 40 G is observed 30\% above threshold at the flow lateral boundary. The rms fluctuations are larger than the corresponding mean value for two of the components. The scaling of the mean square magnetic field is compared to a prediction previously made for high Reynolds number flows.
Complete list of metadata

Cited literature [20 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00492342
Contributor : Mickaël Bourgoin Connect in order to contact the contributor
Submitted on : Tuesday, June 15, 2010 - 4:32:56 PM
Last modification on : Thursday, March 17, 2022 - 10:08:09 AM
Long-term archiving on: : Friday, October 19, 2012 - 2:11:10 PM

File

Monchaux2007_PRL.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Romain Monchaux, Michaël Berhanu, Mickaël Bourgoin, Marc Moulin, Philippe Odier, et al.. Generation of a magnetic field by dynamo action in a turbulent flow of liquid sodium. Physical Review Letters, American Physical Society, 2007, 98 (4), pp.044502. ⟨10.1103/PhysRevLett.98.044502⟩. ⟨hal-00492342⟩

Share

Metrics

Record views

315

Files downloads

305